Collapsible shelter



FIG. 1 is a front view a collapsible shelter showing my design in a flexed condition;

FIG. 2 is a right side view thereof, the left side view being a mirror image thereof;

FIG. 3 is a rear perspective view thereof;

FIG. 4 is a front view of the collapsible shelter in a flat condition; and,

FIG. 5 is a right side view thereof, the left side view being a mirror image thereof.

The broken lines shown herein are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a collapsible shelter, as shown and described. 